Connecting means for induction-coils used in radio and ignition systems



S. C. McKEOWN.

CONNECTING MEANS FOR INDUCTION COILS USED IN RADIO AND IGNITION SYSTEMS.

APPLICATION man OCT. 19. [9!].

1,385,566, 1 I Patenitfi-d July 26, 1921.

- INVENTOR. JAM/4 C, MMmw/v.

wum y ATTORNEY UNITED STATES PATENT OFFICE.

SAMUEL C. MGKEOWN, OF EAST ORANGE, NEW JERSEY, ASSIGNOR T0 SPLITDORF ELECTRICALCOMPANY, OF NEWARK, NEW JERSEY.

connncrms mms'ron INDUCTION-COILS USED IN RADIO AND IGNITION SYSTEMS.

I Specification of Letters Patent.

Patented July 26', 1921.

Application filed October 19, 1917. Serial No. 197,443.

To all whom itmaq concern."

' Be it known that I, SAMUEL C. MGKEOWN, a citizen of the United States,residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Connecting Means for Induction-Coils Used in Radio and Ignition Systems, of which the following is a specification.

' My invention relates to magnetos used for the combined purpose of supplying current adapted to be used inignition and radio systems and has for its object to provide means for connecting the induction coil electrically and ma netically into their respective structures. vn Patent 1,186,216, issued June 6, 1916, to H. R Vzin Deventer, there is shown and described a combined ignition and radio system so'that no claim is made herein to the system itself, description of which may be found in said patent, but my invention is directed'more particularly to the details employed in practice in carrying out the functions described in said patent.

In i nition generators used on aeroplanes, speciaf precautions must be used in securely fastening the various-members of the machine securely together, at the same time, the securing means should be such that those parts which are likely to become injured by the work imposed on them, may be readily detached for the urpose of inspection and renewal. The in uction coil of a-high ten sion magneto suitable for both ignition and radio work is subjected to severe electrical strains and breaks down occasionally and it isone 0f the objects of my invention to pro vide amounting for the induction coil such that while in operation the coil may be held firmly in place yet the holding means may be quickly detached and the coil removed.

It is another object of my invention to consolidatethe various parts used in conveying the current to both ignition and radio systems into unitary, structures as far as possible in order to facilitate quick renewals in the field.

Other and further'objects will be apparent to those skilled in the art after a study of this specification taken in connection with the drawing wherein Figure 1 is a side elevation ona reduced scale of a magneto suitable for the purpose, a part of the cover plate being broken away to show certain interior details.

Fig. 2 is an enlarged part end andpart sectional view, on the line 22 of Fig. 1.

Fig. 3 is an end view of the terminal block preferably attached to the induction coil.

In the various views, like numbers refer to corresponding parts. In Fig. 1 there is shown. a magneto '1 of the general type shown in above mentioned Van Deventer patent but having a four lobe rotor three of which 23 and 4: are shown, the other being directly behind l. The rotor is adapted to operate between the core pole pieces 5 and 6 held in a relatively fixed position in the support structure 7. The outer ends of the core pole pieces 5 and 6 are perforated to receive bolts 8 and 9 on which are pivotally mounted two similar yokes 10 which may be of magnetic material to assist in carrying the magnetic flux. The induction coil 11 is made up of the usual primary and secondary windings wound on a core 12 of magnetic material whose ends project beyond the coil heads. Attached to one side of the coil 11 is a terminal block 13 which is shown as being held to the head of the coil by screws 14 engaging inserts 15. Mounted on the terminal block 13 in any suitable manner, preferably molded therein, is a contact 16 to which the secondary of the induction coil is connected by way of opening 17. Extending from the terminal block 13 is an arm 18 that carries a double ended contact, the one on one side 19 being somewhat pointed to serve as a sparking point, the other 20 on the other side being in the shape of an annular disk of sufiicient area to make certain that brush 21 will contact therewith. Both the contacts 19 and 20 are electrically connected by member 22 to'thc contact 16 and thereby to the secondary or high tension winding of the induction coil. Preferably mounted on the coil is a spark gap electrode'23. This electrode is grounded and is associated with the sparking'point 19. After the coil 11 has been wound and all of the parts assembled thereon as above described, it is then placed in the position so that the core 12 bridges the core pole pieces 5 and 6 and the yokes 10 are thrown upward over the ends of the core 12. The yokes 1O carry screws 24 which are adapted to screw into the depressions 25 in the ends of the core 12 thereby locking themselves in place and the core 12 firmly against the core pole pieces 5 and 6. The

cover plate 26 of the magneto has a boss 27 punched outwardly. Mounted on this boss by any suitable means, such as screws 28, is a radio terminal block 29. The block 29 has a finger 30 extending within the frame work of the dynamo and the end thereof carries the brush 21 which is held in working position against the contact 20 by spring 31. The radio wire is adapted to enter the block 20 through the hole 32 and tobe clamped therein by an suitable means such as screw 38. On the end of the magneto 1 is an ignition distributor block having any suitable distributing means, one end of which 35 is shown in Fig. 1. The end 35 carries a collector brush 36 which makes electrical connection with the contact 16 being held in working relation by spring 3'7. The other parts oi the magneto need not be further described herein as they form no part of my presentinvention. which is clearly set forth in the ab ve description.

The construction of the details shown and described may be varied considerably without departing from the spirit of my invention and the scope of the appended claims.

Having thus described my invention what I claim is:

1. In combination, an ignition dynamo having relatively fixed core pole pieces with means for directing flux therethrough, an induction coil having primary and secondary windings, a core for said windings bridging said pole pieces. quick detachable means for clamping the core to the core pole pieces, a terminal block attached to the side of said coil, a contact carried by said block and having said secondary winding connected there to. an ignition terminal connected to said contact, an arm attached to said block, a double ended contact carried by said arm and electrically connected with the first mentioned contact, a spark gap cont-act associated with one oi said double end contacts and a radio terminal in electrical engagement with the other end of said double contact.

2. In combination, an ignition dynamo having relatively fixed core pole pieces with means for directing flux therethrough, an induction coil having primary and secondary windings, a core for said windings bridging said pole pieces, a yoke pivoted to the end of each pole piece and carrying means for clamping said core and coil in working inductive relationship with said pole pieces, a block of insulating material carried by said coil, a contact in the block having said secondary winding connected thereto, an arm integral with the block, a sparking point on one side of the arm and a brush contact on the other both electrically connected to the secondary winding, an ignition terminal connected to the first mentioned contact, a ground terminal opposite said sparking point and a radio terminal connected with the brush contact as described.

3. In a dynamo for producing current adapted for ignition and radio purposes, the combination of a core structure having relatively fixed core pole pieces with means for directing magnetic flux therethrough and an induction coil having a magnetic core bridging said pole pieces, said coil carrying an ignition contact terminal, and a combined spark gap and radio terminal with means for connecting said terminals into their respective circuits.

l. In a dynamo for producing current adapted for ignition and radio purposes, the

combination of an induction coil and a magnetic core structure for exciting said coil, a rotating element to produce flux changes through said coil, a terminal block attached to said coil, an ignition contact, a radio contact and a spark gap contact all carried by said block, as and for the purpose described.

In a dynamo for producing current adapted for ignition and radio purposes, the combination of a unitary structure consisting of; an induction coil having its core projecting at both ends, a terminal block carrying an ignition contact, a radio contact and a spark gap contact; a magnetic core structure to transmit magnetic flux to said coil core, quick detachable means fastened to portions of said core structure for clamping said projecting coil core ends into magnetic circuit with said magnetic core structure, and means for varying the flux through the coil to produce current impulses therein, as and for the purpose described.

6. In a dynamo for producing current adapted for ignition and radio purposes, the combination of a unitary structure consisting of; an induction coil having its core projecting at both ends, a terminal block carrying an ignition contact, a radio contact and a spark gap contact; a magnetic core structure to transmit magnetic flux to said coil core terminating in pole pieces to receive said coil core ends, U-shaped yokes pivoted on said pole pieces and carrying means for clamping said core ends thereto into magnetic circuit with the magnetic field structure, a rotating element between said pole pieces to periodically change the flux through said coil core whereby current impulses are set up in the coil windings, with means for collecting from said terminal block and sending out both ignition and radio current.

In witness whereof, I aflix my signature.

SAMUEL o. MoKEOWN. 

